Senior UX Designer - Publishing Platform

Lego; Greater London; On-site; GBP 70,000 - 100,000; Full time

Job summary

LEGO Digital Play in London is seeking a Senior UX Designer to shape the player-facing experience of our Publishing Platform. This mobile-first role spans games and platform design, with ownership of UX from research to UI specs.

You will report to the Senior Director, Product in a newly created role that builds a design system and collaborates across engineers and product teams to deliver delightful, accessible experiences for kids, parents, and adult fans.

Qualifications

• Extensive UX experience with strong research emphasis, including mobile contexts.
• Ability to translate data from funnels and A/B tests into design decisions.
• Experience researching for a general audience (kids to adults) and age-appropriate methods.
• Portfolio or case studies showing shipped, player-facing mobile work with measurable outcomes.
• Strong fluency in mobile design across iOS/Android and responsive layouts.
• Understanding of how UI is implemented in game engines (Unity/Unreal).
• Proficiency with modern prototyping tools and AI-assisted workflows.

Responsibilities

• Partner in player research to plan studies and translate insights into design direction.
• Own UX for mobile-facing platform features, wireframes, prototypes, and UI specs.
• Design for a general audience across ages, ensuring safety and delight.
• Use analytics and A/B testing to identify friction and measure impact.
• Create mobile-first experiences across sizes and orientations.
• Build a shared component design system for cross-team use.
• Champion accessibility and inclusive design standards.
• Collaborate with product managers, platform engineers, and teams to balance needs.

Skills

Mobile UX design

User research

Figma

UI prototyping

A/B testing

Accessibility

Cross-functional collaboration

Design systems

Unity/Unreal basics

Communication

Tools

Figma

Job description

LEGO Digital Play

will bring the LEGO brand into digital entertainment in new, innovative, and wholly-owned ways. Our mission is to ensure the LEGO Brand remains as powerfully a part of children’s lives in the coming decades as it has ever been. We aim to reach every kid on the planet, their parents, and adult fans of LEGO—and provide them with meaningful, magical, and playful new experiences.

Central Technology is the engineering heart of LEGO Digital Play, a venture within the LEGO ecosystem dedicated to pioneering creative and joyful digital experiences. Our teams build the foundational platforms, tools, and capabilities that power LEGO's digital future. We work at the intersection of play, applied AI, and developer tooling to bring the LEGO brand to a new generation of digital builders. It's a rare opportunity to shape something from the ground up within one of the world's most loved brands.

We are at the earliest phases of this new company, offering a unique opportunity to build a new entity for the world's most beloved and trusted brand. Our culture is open, collaborative, intellectually rigorous, and creatively vibrant.

Role Summary

We're looking for a Senior UX Designer to shape the player-facing experience of our Publishing Platform. This is a mobile-first role at the intersection of games and platform design: the surfaces you design appear across our platform and reach players across a range of experiences.

This is a newly created role based in London; this is an individual contributor role reporting to the Senior Director, Product.

Key Responsibilities

• Partner in player research: plan studies, synthesise findings, and turn insights into design direction the whole team can act on
• Own the UX for player-facing platform features on mobile - flows, wireframes, prototypes, and UI specs - grounded in evidence from research at every stage.
• Research and design for a general audience spanning kids, parents, and adult fans - age-appropriate, safe by default, and delightfully playful for everyone
• Use analytics, funnel data, and A/B testing alongside qualitative research to identify friction, propose improvements, and measure the impact of shipped work
• Design mobile-first experiences that adapt gracefully across screen sizes, aspect ratios, notches, foldables, and both portrait and landscape orientations
• Build a component design system that internal teams consume as a shared tool: components, patterns, and guidance that serve players of every age
• Champion accessibility and inclusive design across the platform, meeting or exceeding mobile accessibility standards
• Collaborate closely with product managers, internal teams, and platform engineers to balance player needs, team needs, and technical realities

Required Qualifications

• Extensive UX experience with a strong research emphasis, including at least 2 years in mobile games, gaming platforms or comparable high-scale consumer mobile products
• Proven ability to translate quantitative and qualitative data - funnels, A/B tests, and player feedback into insights that change what gets built and why
• Experience researching and designing for a general audience (kids through adults) including age-appropriate research methods and an understanding of how age shapes comprehension, interaction, and trust
• A portfolio or case studies demonstrating shipped, player-facing mobile work where research clearly drove the design decisions and measurable outcomes
• Strong fluency in mobile design, including touch ergonomics, gesture patterns, iOS and Android platform conventions, performance-aware design and responsive layout across device classes
• Understanding of how UI is implemented in game engines. You do not need to be an engineer, but you know why a design that is trivial in native mobile might be expensive in Unity or Unreal, and you design accordingly
• Solid design and prototyping skills across modern tooling - Figma is required – with fluency in AI-assisted design and prototyping workflows (e.g. prompt-to-prototype or code-based prototyping tools); Our stack is still being defined, and we expect you to help define it
• Excellent communication skills, with the ability to socialise research findings and articulate design decisions to internal teams, engineers and leadership
• Comfort operating in early-stage environments where research practices and design standards are still being defined

Preferred Qualifications

• Experience designing for children in regulated digital environments
• Experience building a mobile design system for a platform team, where multiple teams consume it
• Experience designing embedded UI (overlays, webviews, native modules) that lives inside other applications
• Familiarity with common engagement and monetization patterns in live digital products
• Experience with localization and designing for global audiences
• Working knowledge of mobile accessibility guidelines (WCAG, platform-specific standards)
• A genuine love of games - you play on mobile and have opinions about what great platform UX feels like.